10 SECONDSA(R) TRACK SPIKES 3/16" NEEDLE (5mm) 14 pack :: Dig in getting ferocious traction and durability from these awesome 10 SecondsA(R) Track Spikes. You'll appreciate the unbeatable long-lasting wear of these spikes that are heat tested for maximum durability. Plus you're sure to get maximum traction no matter where your training takes you because these 10 SecondsA(R) Spikes can be used on all surfaces including asphalt synthetic and natural.